Improvement in buck-saw frames



STATES PATENT OFFICE.

EDWARD M. MADDEN AND SHATTIECE D. ROBERTS, (ADMINISTRATORS THOMAS D.ROBERTS, DEOEASED,) OF MIDDLETOWN, NEW YORK.

IMPROVEMENT IN BUCK-SAW FRAMES.

Specification forming part of Letters Patent No. 116,490, dated June 27,1871.

To all whom it may concern:

Be it known that THOMAS D. ROBERTS, de.- ceased, late of Middletown, inthe countyot Orange, in the State oi' Neur York, did, during his flifetime, invent certain Improvements in the Frames of Buck-Saws; andwe, EDWARD M. MAD- Y DEN, administrator, and SHATTIEOE D. ROBERTS,

administratrix of the estate of said THOMAS D. ROBERTS, do herebydeclare that the following is a i'ull, clear, and exact descriptionthereof, the object ofthe invention being to strengthen the frame instraining the saw that is contained therein; and l it consists in theconstruction and application oi'a metallic brace to the frame in` suchmanner as to secure the object aimed at, and thereby create a newarticle of manufacture.

In the drawing, Figure l is a side view of the saw-frame complete. Fig.2 is a side view of the f strengthening-brace, and Fig. 3 is atransverse view ot' the same.

A A are the usual end pieces to the frame. B 1s a strain-brace, madeeither square, round, orother desired form' or shape. O is the commonstraining' screw-rod,having screw-nut c, by which the saw is strained inthe usual way. D D are metal strengthening-braces', formed to have theopen thimble Dl ot' the shape to receive and fit around the brace B, andhas inclined and bent arms d projecting from opposite sides of thethimble. At d' these arms bend, to be parallel with the sides of theOpening through the thimble, and the Shanks formed by so bending areinserted and t in holes in the end pieces A, and are thereheld by pinsd, that pass through both the end piecesA and Shanks of the braces D.The introduction of the strengthening-braces D, constructed to receiveand embrace the strain-brace B, makes the frame much stron ger bypreventing all the force exerted by turning the screW-nut ontostrain-rod C from tending to break the ends A at the point where thebrace B enters them, as by the use of these braces D the effect isthrown away from such point, and is distributed to where the Shanks ofbrace D enter the end pieces A A; hence the end pieces may be madesmaller, be lighter, and have the same strength. The brace 'B may alsobe made smaller, and, consequeutly,'be lighter, and still retain itsstrength,"because the distance between the `points embraced Vby thethimbles of braces D lessens the length `of the brace, on

which the lateral strain could be applied, as n much as the bracesproject inward from the end pieces A A or from the shoulders of brace B.

Having thus described the invention, what is claimed, and Letters Patentasked for, is-

1. The metal brace D, in combination with the

